2.2 External Forces Acting on Structures

First Complete the VIRTUAL LAB activity and record your answers on the Lab Sheet. When you are finished, make an 8 page foldable and record your notes on the following concepts:

Page 1 - Title Page: External Forces
Page 2 - Dead Loads
Page 3 - Live Loads
Page 4 - Strong Shapes
Page 5 - Arches and Flying Buttresses
Page 6 - Center of Mass
Page 7 - Activities Summary (Chair lift and Pinky Power)

Page 8 - glue this page to the back of your science portfolio



Dynamic Dictionary:
http://www.diydoctor.org.uk/projects/forces.htm



Building Big Virtual Lab Sheet:


Building Big Virtual Lab on Loads:
http://www.pbs.org/wgbh/buildingbig/lab/loads.html

Building Big Virtual Lab on Shapes:
http://www.pbs.org/wgbh/buildingbig/lab/shapes.html



Booklet Foldable for your science portfolio:






The human Arch and Flying Buttresses:

http://www.pbs.org/wgbh/buildingbig/educator/act_mini_arch.html






Center of Mass:












Why can most girls lift the chair but most boys can't:

http://wiki.answers.com/Q/What_is_the_center_of_gravity_chair_test

Chair lift (pg 29) and Pinky Power (pg 28)
http://books.google.ca/books?id=M-ckOJiI1dkC&pg=PA29&lpg=PA29&dq=center+of+mass+chair+lift&source=bl&ots=YF5pHh187M&sig=ZuedRG22YAvNlHPFZwD6dSTuaqQ&hl=en&sa=X&ei=7k8cUa_mB6iEjALDp4HoDQ&ved=0CG0Q6AEwBw#v=onepage&q=center%20of%20mass%20chair%20lift&f=false